首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   16506篇
  免费   555篇
  国内免费   5篇
各国政治   688篇
工人农民   738篇
世界政治   1090篇
外交国际关系   568篇
法律   10623篇
中国共产党   7篇
中国政治   167篇
政治理论   3010篇
综合类   175篇
  2020年   229篇
  2019年   276篇
  2018年   340篇
  2017年   397篇
  2016年   399篇
  2015年   300篇
  2014年   312篇
  2013年   1516篇
  2012年   460篇
  2011年   481篇
  2010年   398篇
  2009年   421篇
  2008年   505篇
  2007年   544篇
  2006年   520篇
  2005年   471篇
  2004年   465篇
  2003年   492篇
  2002年   427篇
  2001年   668篇
  2000年   543篇
  1999年   478篇
  1998年   245篇
  1997年   168篇
  1996年   201篇
  1995年   174篇
  1994年   196篇
  1993年   198篇
  1992年   323篇
  1991年   355篇
  1990年   340篇
  1989年   281篇
  1988年   321篇
  1987年   271篇
  1986年   317篇
  1985年   280篇
  1984年   230篇
  1983年   218篇
  1982年   176篇
  1981年   193篇
  1980年   127篇
  1979年   171篇
  1978年   122篇
  1977年   106篇
  1976年   96篇
  1975年   123篇
  1974年   132篇
  1973年   103篇
  1972年   99篇
  1969年   98篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
While analyzing the available published data, we found significant differences in definition of alleles of the HUMCD4 polymorphic chromosome locus. It is an obstacle for comparing the expertise results obtained while using the locus as molecular individualization system in different laboratories and, as a consequence, it hinders the use of the said marker in building up a reference database. The structure of the HUMCD4 locus was analytically investigated and the distribution of the locus alleles was systemized in a sample of 407 persons (citizens of Russia who are not blood relatives) within the present case study for the purpose of a detailed definition of its allele's characteristics. We worked out recommendations related with the nomenclature standardization of alleles of the HIMCD4 locus and specified the main population features of the locus polymorphism on the bases of the studied sample of Russia's citizens. The results can be used as reference parameters in interpreting the findings of the molecular-genetic identification expertise and examinations and in building up databases.  相似文献   
992.
The shaped-up experience of management and implementation of expertise as applicable to civil and criminal cases and with respect to the requirements of new legislative acts was analyzed. Issues connected with composing a commission of experts, with the range of competence of forensic medical expert and of clinical practitioner, as well as with the content and form of the expert conclusions are under discussion.  相似文献   
993.
994.
995.
996.
If male workers categorize different groups of women coworkers and, subsequently, treat them differently, the experiences of women from one of these groups would not be indicative of the experiences of women from another group. When this different treatment involves hostile environment sexual harassment of one group, but not the other, then the law must recognize the possibility of "selective sexual harassment." Without this understanding of the nuances of the workplace dynamics, a court could mistake the women of the unharassed group as representing "reasonable women" and the women of the harassed group as simply oversensitive. This paper draws on empirical data to demonstrate such a situation and advocates for a version of the "reasonable victim" standard to facilitate a closer analysis of hostile environment sexual harassment suits.  相似文献   
997.
Weight force during prone restraint and respiratory function   总被引:1,自引:0,他引:1  
Prone maximal restraint position (PMRP, also known as hogtie or hobble) is often used by law enforcement and prehospital personnel on violent combative individuals in the field setting. Weight force is often applied to the restrained individual's back and torso during the restraint process. We sought to determine the effect of 25 and 50 lbs weight force on respiratory function in human subject volunteers placed in the PMRP. We performed a randomized, cross-over, controlled trial on 10 subjects placed in 4 positions for 5 minutes each: sitting, PRMP, PRMP with 25 lbs weight force (PMRP+25), and PRMP with 50 lbs weight force placed on the back (PMRP+50). We measure pulse oximetry, end-tidal CO2 levels, and forced vital capacity (FVC) and forced expiratory volume in 1 second (FEV1). FVC and FEV1 were significantly lower in all restraint positions compared with sitting but not significantly different between restraint positions with and without weight force. Moreover, mean oxygen saturation levels were above 95% and mean end-tidal CO2 levels were below 45 mm Hg for all positions. We conclude that PMRP with and without 25 and 50 lbs of weight force resulted in a restrictive pulmonary function pattern but no evidence of hypoxia or hypoventilation.  相似文献   
998.
A cardiac concussion is caused by a sudden, nonpenetrating, localized impact to the chest that is theorized to result in almost simultaneous sudden death from a disruption to the conductive system. The detailed external/internal forensic examination of the body reveals no evidence of structural, pathologic, or histologic signs of trauma to the heart. A cardiac concussion is a rare and often overlooked cause of sudden death. This type of sudden death is typically seen among younger individuals participating in sports involving projectiles and, to a lesser degree, where collisions occur. Cardiac concussions are clinically, pathologically, and chemically different from a cardiac contusion. The objective of this paper will be to define cardiac concussion, differentiate between cardiac concussion and cardiac contusion, and describe the clinical and pathologic features of a 32-year-old white male who died of a cardiac concussion following a collision with a catcher during a softball game. The civil ramification of incorrectly diagnosing the manner of death in cases of death involving a cardiac concussion will also be addressed.  相似文献   
999.
Childhood panhypopituitarism may be acquired or congenital. Children with panhypopituitarism can present clinically with diabetes, growth failure, decreased bone density, and morbid obesity. In the forensic setting without the proper history, it can be misdiagnosed as child abuse or neglect. We report a case of a 3-year-old black girl who was admitted to the emergency room with apnea and subsequently died. While at the emergency department, it was discovered that the child had a fractured left hip and was severely growth retarded for age. The coroner wanted to rule out child abuse and/or neglect and requested an autopsy based on the physical findings identified by hospital staff. Significant findings at autopsy included small for age (15th percentile for age), hypoplastic brain/pituitary gland/adrenal gland/thyroid gland, abnormally formed skull with an occipital protuberance, a fractured left hip with decreased bone density, and central adiposity. Subsequent to the autopsy, it was discovered that at 6 weeks of age the child suffered from group B streptococci meningitis that resulted in panhypopituitarism. The panhypopituitarism then resulted in seizure activity, diabetes insipidus, and growth retardation. The authors hope this case report and review of the literature will assist investigators, pathologists, and clinicians in making a distinction between neglect or inflicted injury of child abuse and panhypopituitarism that can present with similar signs and symptoms.  相似文献   
1000.
Sudden unexpected death in an infant caused by or associated with neoplasm is rare. We describe a case of a sudden death in an apparently healthy 3-month-old female, in which the autopsy revealed a multiple type II infantile hepatic hemangioendothelioma (IHE). This uncommon tumor has, untreated, a relatively high mortality rate, mainly due cardiac failure resulting from massive arteriovenous shunts, but the association with sudden infant death is very rare.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号